Windowing

This topic describes the two window systems for Linux:

• Wayland

• EGLDevice/EGLOutput

The following table lists the window system name and its main library.

Window System	Main Library
Wayland Window System	Weston Compositor
EGLDevice/EGLOutput	No main library.

X11 Deprecation and Application Compatibility

Mutter Wayland is now the default compositor for Ubuntu desktop.

Legacy X11 applications continue to function through the XWayland compatibility layer. While XWayland provides hardware acceleration, native Wayland applications offer superior performance and long-term platform support.

Note

On the login screen, use the “ubuntu” session option for successful login. The “ubuntu on Xorg” option will fail to log in and is not supported.

Development Recommendations:

• Existing applications: Supported through XWayland compatibility; migration to native Wayland recommended

• New development: Target native Wayland APIs for optimal performance and platform compatibility

• Performance-critical applications: Migrate to native Wayland for maximum efficiency

• Remote Access: Traditional X11 VNC servers such as x11vnc and tigervncserver are not supported on DriveOS 7.2 Linux NSR. This applies to all client APIs, including native X11 applications, XWayland-hosted applications, and Vulkan SC applications using the X11 window system integration. Use Weston’s native VNC backend for remote desktop access — see VNC for setup instructions.

For Wayland development guidance, see Wayland Window System.

• Wayland Window System
  • EGLOutput/EGLDevice Specifications
  • Runtime Configuration
  • DRM backend
  • Weston Common Options
  • Weston Backend Options
  • Weston Configuration File Location
  • Weston Display Configuration
  • Prerequisites to Starting Weston
  • Starting Weston
  • Running Weston Samples
  • Compositing Mode in Weston
  • weston-debug
  • Weston dma-buf Support
  • Gnome-Wayland Desktop Shell Support
• EGLDevice
  • EGLDevice
  • EGLOutput
  • EGLStream
  • Supported Pixel Formats